My GGTrainer 480 worked fine at first then i folded it up and now it will not turn on at all. I looked inside at motorboard, nothing out of the ordinary.I dont know where my receipt is...What do i do? i called in when i first got it because i couldnt get it to power on but discovered soon after that there was a wire not plugged to the board. once i plugged it in it worked fine. When the guy called me back i told him it was working fine. please help!